Parts such as the Swingarm: Shaft-swing Arm, Nut,6mm, Adjuster-chain, Collar,10.1x17x183 are included in the Ar80c6 1988 United Kingdom Swingarm parts fiche.
The Nut,6mm is the cheapest item from this partsfiche.
The most expensive part in this assembly is the Arm-comp-swing,no.1 G.